Ulster will blink, but as I have said, they may struggle to apply fees to their 'Step' customers.
Why would they struggle to introduce fees for a specific account? NIB have done this to their freebank account. Would the name not imply you got free banking and therefore be contrary to decent marketing or advertising? Didn't stop NIB.
NIB have introduced fees, I can't see why UB would have a struggle.
Unless it expressly stated you're entitled to fee-free banking for life or the duration of holding the account I don't see how they would struggle.
At least paying fees to AIB is actually helping the Irish economy.